空心型框架桥的力学特性分析  

Analysis of Mechanical Properties of Hollow Frame Bridge

作　　者：吴凤娇[1] 李家稳[1] 

机构地区：[1]北方工业大学土木工程学院,北京100144

出　　处：《北方工业大学学报》2016年第3期89-93,共5页Journal of North China University of Technology

摘　　要：为获得两孔空心型框架桥的性能,本研究以某两孔铁路框架桥实际工程为背景,将桥顶板和侧板分别沿铁路走向方向和墙高度方向挖孔形成空心板.采用Midas Civil有限元分析软件建立该结构在设计荷载作用下的计算模型,分析研究桥体竖向位移和应力的变化规律,并与2~12m的原型框架桥进行比较.研究结果显示空心型框架桥在满足强度、刚度等技术要求的前提下,具有减轻结构自重、方便顶进施工、节省材料的优势.To obtain the performance of the two-hollow frame bridge,this study took an actual railway frame bridge as the background;holes were dug both on the top plate and the side plate respectively along the railway direction and the height of the wall.The finite element analysis software Midas Civil was used to establish the model of the structure under the action of the design loads.The laws of vertical displacement and stress were analyzed and the laws was also compared with the 2~12mprototype frame bridge.The research results showed that the hollow frame bridge has the advantages of reducing the weight of the structure,being convenient in jacking construction and saving materials,which can also meet the technical requirements of strength,rigidity and others.

关 键 词：框架桥 空心板 竖向位移 应力 

分 类 号：U449.82[建筑科学—桥梁与隧道工程]